The Nikak weblog suggests creating a separate Firefox profile for your work browsing in order to avoid the distractions of the always-beckoning interweb.

Here is the list of some advantages:

No "play" bookmarks

No "play" usernames/passwords (I let Firefox remember mine)

Install only those extensions needed for work (Firefox works faster)

If you're really serious about your work-only profile, I'd suggest installing Greasemonkey and Gina's Invisibility Cloak script to keep temptation from getting the better of you. How do you make good use of Firefox's profile manager? Let us know in the comments or at tips at lifehacker.com. — Adam Pash